/* ============================================
   CSS RESET
   ============================================ */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { line-height: 1.6; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; overflow-x: hidden; }
img, svg, video { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; }
h1, h2, h3, h4, h5, h6 { line-height: 1.1; overflow-wrap: break-word; }
p { overflow-wrap: break-word; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ============================================
   DESIGN TOKENS
   ============================================ */
:root {
  --surface: #fcf9f8;
  --surface-container-low: #f6f3f2;
  --surface-container: #f0edec;
  --surface-container-lowest: #ffffff;
  --surface-container-high: #eae7e7;
  --on-surface: #1b1c1b;
  --on-surface-variant: #555;
  --on-surface-muted: #999;
  --dark: #1a1a2e;
  --accent: #00D26A;
  --accent-dark: #006d34;
  --on-accent: #00210b;
  --outline-variant: rgba(187, 203, 186, 0.15);

  --font-headline: 'Space Grotesk', sans-serif;
  --font-body: 'Manrope', sans-serif;

  --tracking-tight: -0.04em;
  --tracking-tighter: -0.05em;

  --shadow-ambient: 0 20px 40px rgba(27, 28, 27, 0.05);
  --shadow-card: 0 40px 80px -15px rgba(0, 0, 0, 0.03);
  --shadow-nav: 0 40px 60px -5px rgba(27, 28, 27, 0.04);

  --radius: 0.5rem;
  --radius-sm: 0.375rem;

  --max-width: 1440px;
  --px: clamp(1.5rem, 4vw, 3rem);

  --text-hero: clamp(3rem, 8vw, 6rem);
  --text-display: clamp(2.25rem, 6.5vw, 5rem);
  --text-heading: clamp(1.625rem, 3.5vw, 2.75rem);
  --text-subheading: clamp(1.25rem, 2.5vw, 1.625rem);
  --text-body-lg: clamp(1.0625rem, 1.8vw, 1.3125rem);
  --text-body: clamp(0.9375rem, 1.4vw, 1.0625rem);
  --text-small: clamp(0.6875rem, 1vw, 0.8125rem);

  --ease-smooth: cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-button: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ============================================
   BASE STYLES
   ============================================ */
body {
  font-family: var(--font-body);
  background: var(--surface);
  color: var(--on-surface);
}

::selection {
  background: var(--accent);
  color: var(--on-accent);
}

.headline {
  font-family: var(--font-headline);
  letter-spacing: var(--tracking-tight);
  font-weight: 700;
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--px);
}

.section-light {
  background: var(--surface);
  padding-block: clamp(3.5rem, 7vw, 5.5rem);
}

.section-dark {
  background: var(--dark);
  color: var(--surface);
  padding-block: clamp(5rem, 12vw, 12rem);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: var(--on-accent);
  padding: 1.125rem 2.25rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: var(--tracking-tight);
  border: none;
  cursor: pointer;
  transition: all 450ms var(--ease-smooth);
  white-space: nowrap;
}
.btn-primary:hover {
  filter: brightness(1.05);
  box-shadow: 0 12px 32px rgba(0, 210, 106, 0.2);
}
.btn-primary:active {
  transform: scale(0.97);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--dark);
  color: var(--surface);
  padding: 1.125rem 2.25rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1.0625rem;
  letter-spacing: var(--tracking-tight);
  border: none;
  cursor: pointer;
  transition: all 450ms var(--ease-smooth);
  white-space: nowrap;
}

/* ============================================
   ANIMATIONS
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.45s var(--ease-smooth), transform 0.45s var(--ease-smooth);
  will-change: opacity, transform;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(252, 249, 248, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: padding 300ms var(--ease-smooth), box-shadow 300ms var(--ease-smooth);
}
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max-width);
  margin-inline: auto;
  padding: 1.5rem var(--px);
  transition: padding 300ms var(--ease-smooth);
}
.nav.scrolled .nav-inner {
  padding-top: 1rem;
  padding-bottom: 1rem;
}
.nav.scrolled {
  box-shadow: var(--shadow-nav);
}
.nav-logo {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark);
  letter-spacing: -0.03em;
}
.nav-links {
  display: none;
  align-items: center;
  gap: 2.5rem;
}
.nav-links a {
  font-family: var(--font-headline);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--dark);
  opacity: 0.6;
  transition: opacity 300ms;
}
.nav-links a:hover { opacity: 1; }
.nav-links a.active { opacity: 1; }
.nav-cta { display: none; }
.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: all 300ms var(--ease-smooth);
}

/* Mobile menu */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--surface);
  z-index: 99;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 3rem var(--px);
  transform: translateX(100%);
  transition: transform 400ms var(--ease-smooth);
}
.mobile-menu.open { transform: translateX(0); }
.mobile-menu a {
  font-family: var(--font-headline);
  font-size: 2rem;
  font-weight: 700;
  color: var(--dark);
  padding: 0.75rem 0;
  letter-spacing: var(--tracking-tight);
}
.mobile-menu .btn-primary {
  margin-top: 2rem;
}
body.no-scroll { overflow: hidden; }

@media (min-width: 768px) {
  .nav-links { display: flex; }
  .nav-cta { display: inline-flex; }
  .menu-toggle { display: none; }
}

/* ============================================
   PAGE HERO (shared across inner pages)
   ============================================ */
.page-hero {
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 8rem;
  padding-bottom: 3rem;
}
.page-hero-tag {
  display: inline-block;
  padding: 0.375rem 1rem;
  background: var(--surface-container-high);
  border-radius: 2rem;
  font-size: var(--text-small);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 700;
  color: var(--on-surface-variant);
  margin-bottom: 1.25rem;
}
.page-hero-headline {
  font-size: var(--text-hero);
  line-height: 0.95;
  letter-spacing: var(--tracking-tighter);
  max-width: 1000px;
  margin-bottom: 2rem;
  color: var(--dark);
}
.page-hero-sub {
  font-size: var(--text-body-lg);
  color: var(--on-surface-variant);
  max-width: 680px;
  line-height: 1.7;
}

/* ============================================
   COMMON TEXT UTILITIES
   ============================================ */
.text-link {
  font-family: var(--font-headline);
  font-weight: 700;
  color: var(--accent-dark);
  font-size: 1rem;
  transition: color 350ms;
}
.text-link:hover { color: var(--accent); }
.text-link .arrow {
  display: inline-block;
  transition: transform 350ms;
  margin-left: 0.25rem;
}
.text-link:hover .arrow { transform: translateX(4px); }

.section-label {
  font-size: var(--text-small);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--on-surface-muted);
  font-weight: 700;
  margin-bottom: clamp(2rem, 4vw, 3rem);
}

/* ============================================
   FINAL CTA (shared across all pages)
   ============================================ */
.final-cta {
  text-align: center;
  padding-block: clamp(6rem, 12vw, 10rem);
}
.final-cta h2 {
  font-size: var(--text-display);
  max-width: 720px;
  margin-inline: auto;
  margin-bottom: 2rem;
  line-height: 1.1;
  color: var(--surface);
}
.final-cta .btn-primary {
  margin-bottom: 1.5rem;
}
.cta-sub {
  font-size: var(--text-body);
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.02em;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--dark);
  color: var(--surface);
  padding-block: clamp(4rem, 8vw, 6rem);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.footer-logo {
  font-family: var(--font-headline);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.footer-copy {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.35);
  letter-spacing: 0.03em;
}
.footer-groups {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem 4rem;
}
.footer-group h4,
.footer-group .footer-heading {
  font-family: var(--font-headline);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 1rem;
}
.footer-group a {
  display: block;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.4);
  padding: 0.25rem 0;
  transition: color 300ms;
  letter-spacing: 0.02em;
}
.footer-group a:hover {
  color: var(--accent);
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}